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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Just type “gdb –args” before your command
line.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>You’ll need to unwrap the driver invocation from the actual
cc1 invocation by giving the –### argument to clang. This will
cause it to print out its cc1 command line:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>./bin/clang –ast-print –S test.c –o - -###<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Then take that and run it under gdb:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Gdb –args “./bin/clang” “-cc1” ...<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>And set a breakpoint where you care:<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(gdb) b StmtPrinter.cpp:49<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>(gdb) r<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Breakpoint 1, (anonymous namespace)::StmtPrinter::PrintStmt
(this=0xffffabd0, S=0xad9a438, SubIndent=2)<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Done.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Cheers,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>James<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> eyasu getahun [mailto:eya.get@gmail.com] <br>
<b>Sent:</b> 12 December 2011 14:37<br>
<b>To:</b> Hans Wennborg<br>
<b>Cc:</b> James Molloy; cfe-dev@cs.uiuc.edu<br>
<b>Subject:</b> Re: [cfe-dev] main functions of clang<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-family:"Georgia","serif";
color:#330099'><br>
Hi Hans,<br>
<br>
I can't use debugger. Because am using Linux command line to run clang.
There is no debugging option at Linux. Thanks for the idea.</span><o:p></o:p></p>
<div>
<p class=MsoNormal>On Mon, Dec 12, 2011 at 10:23 PM, Hans Wennborg <<a
href="mailto:hans@chromium.org">hans@chromium.org</a>> wrote:<o:p></o:p></p>
<div>
<p class=MsoNormal style='margin-bottom:12.0pt'>On Mon, Dec 12, 2011 at 2:03
PM, eyasu getahun <<a href="mailto:eya.get@gmail.com">eya.get@gmail.com</a>>
wrote:<br>
><br>
> Hey James,<br>
><br>
> Thanks for the command line option. But where is the function called? I
mean<br>
> in which main method of clang it is called? We know that every function
must<br>
> be called at least at one main method/function to be executed. Let me make<br>
> it clear like this way:<br>
><br>
> int main ()//main method<br>
> {<br>
> S->Printpretty(context);<br>
> }<br>
><br>
> So, which main method is calling our printpretty() function? Hope now its<br>
> clear for you.<o:p></o:p></p>
</div>
<p class=MsoNormal>Hi Eyasu,<br>
<br>
The best way to find out where a function is called from is to run<br>
Clang in a debugger, set a breakpoint in the function you are asking<br>
about (StmtPrinter::PrintStmt), and look at the stack trace.<br>
<span style='color:#888888'><br>
<span class=hoenzb> - Hans</span></span><o:p></o:p></p>
</div>
<p class=MsoNormal style='margin-bottom:12.0pt'><br>
<br clear=all>
<br>
-- <br>
<b>With Best Regards,<br>
<br>
===========================================<br>
Eyasu Getahun</b><br>
<br>
1 Fusionopolis way, #08-10 Connexis North Tower<br>
Singapore 138632, Singapore<br>
Mobile: +393279239907<br>
<b>===========================================</b><o:p></o:p></p>
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